| Salzmann's nodular corneal degeneration | Large and prominent nodules of a solid, opaque material that stands out from the surface of the cornea; occurs occasionally in persons previously affected by phlyctenular keratitis. (05 Mar 2000) |
|---|---|
| serpiginous corneal ulcer | Serpentine ulceration of the cornea, due to infection, most often with Streptococcus pneumoniae. (05 Mar 2000) |
| dendritic corneal ulcer | Keratitis caused by herpes simplex virus. (05 Mar 2000) |
| endothelium, corneal | Single layer of large flattened cells covering the surface of the cornea. (12 Dec 1998) |
| epithelium, corneal | The outer epithelial layer of the cornea, consisting of stratified squamous epithelium continuous with that of the conjunctiva. (12 Dec 1998) |
| juvenile epithelial corneal dystrophy | Epithelial dystrophy characterised by progressive cysts and opacities of the corneal epithelium, with onset in infancy. Inheritance: autosomal dominant with incomplete penetrance. Synonym: Meesman dystrophy. (22 Sep 2002) |
| lattice corneal dystrophy | A corneal dystrophy due to localised accumulation of amyloid in a reticular pattern; manifest at puberty and progressing slowly until eventually useful vision is lost; autosomal dominant inheritance. (05 Mar 2000) |
| anterior margin | The ventral or most forward margin of a structure. Synonym: anterior margin, ventral border. (05 Mar 2000) |
| articular margin | A ring of fibrocartilage attached to the margin of the glenoid cavity of the scapula to increase its depth. Synonym: labrum glenoidale, articular margin, circumferential cartilage, glenoid ligament, glenoidal lip, ligamentum glenoidale. (05 Mar 2000) |
| margin | 1. A border; edge; brink; verge; as, the margin of a river or lake. 2. Specifically: The part of a page at the edge left uncovered in writing or printing. 3. The difference between the cost and the selling price of an article. 4. Something allowed, or reserved, for that which can not be foreseen or known with certainty. 5. Collateral security deposited with a broker to secure him from loss on contracts entered into by him on behalf of his principial, as in the speculative buying and selling of stocks, wheat, etc. Margin draft, that part of a course, as of slates or shingles, which is not covered by the course immediately above it. See Gauge. Synonym: Border, brink, verge, brim, rim. Origin: OE. Margine, margent, L. Margo, ginis. Cf. March a border, Marge. Source: Websters Dictionary (01 Mar 1998) |
| margin of acetabulum | The rim of bone around the acetabulum to which is attached the labrum acetabulare. Synonym: limbus acetabuli, margo acetabularis. (05 Mar 2000) |
| margin of fossa ovalis | A muscular ring surrounding the fossa ovalis in the wall of the right atrium of the heart. Synonym: annulus ovalis, margin of fossa ovalis, Vieussens' annulus, Vieussens' isthmus, Vieussens' limbus, Vieussens' ring. (05 Mar 2000) |
| margin of orbit | The mostly sharp edge of the orbital opening which is the peripheral border of the base of the pyramid-shaped orbit. The superior half of the orbital rim is the supraorbital margin; the inferior half is the infraorbital margin. The frontal, maxillary, and zygomatic bones contribute to the orbital rim, which is generally strong to protect the orbital contents. Weak, potential fracture sites of the rim coincide with the sutures between the participating bones. Synonym: margin of orbit. (05 Mar 2000) |
| margin of safety | The margin between the minimal therapeutic dose and the minimal toxic dose of a drug. (05 Mar 2000) |
| margin of the tongue | The lateral border that separates the dorsum from the inferior surface of the tongue on each side, the two borders meeting anteriorly at the apex. Synonym: margo linguae. (05 Mar 2000) |